SALT Cap and PTET Election Strategy for Pass-Through Owners

The federal itemized deduction for state and local taxes is temporarily higher under current law, but it is still limited and can phase down for higher-income taxpayers. The IRS states that the 2025 limit increased to $40,000 for most filers and is indexed for 2026, with a modified-adjusted-gross-income phase-down. Because those amounts and phase-down thresholds are time-sensitive, the filing-year IRS instructions—not an old return—should control the calculation.

For pass-through business owners, many states offer a Pass-Through Entity Tax (PTET) election. The entity pays a state income tax and generally deducts that payment in computing federal pass-through income, while owners receive the state treatment provided by that jurisdiction. IRS Notice 2020-75 supports the federal deduction for qualifying entity-level state income tax payments, but each state's election, payment, credit, and owner rules still have to be verified.

The Current SALT Limit

The itemized SALT deduction can include:

• State and local income tax (or state sales tax, if elected).

• State and local property tax.

• Foreign income taxes (for itemizing taxpayers — though most claim the foreign tax credit instead).

The allowed amount depends on filing status, tax year, modified adjusted gross income, and total eligible taxes. A PTET model therefore starts with the taxpayer's projected itemized deduction under current law; it should not assume either the old $10,000 ceiling or unlimited deductibility.

The Pass-Through Entity Tax (PTET) Election

To address the cap, more than 30 states have enacted pass-through entity tax regimes. The mechanics:

1. The pass-through entity (S-corp, partnership, or LLC taxed as either) elects to pay state income tax at the entity level on its share of business income allocable to the state.

2. The entity-level tax is a federal business deduction for the entity — reducing the income that flows through to owners on their K-1s.

3. Owners receive a state-level credit for their share of the PTET paid by the entity, eliminating duplicate state taxation.

The result: the state tax is fully deductible federally (because it's an entity-level deduction, not subject to the $10,000 cap), and the owner pays no additional state tax (because of the credit).

How We Model the PTET Decision

The model compares the entity's qualifying state tax payment and federal deduction with the owners' state credits, individual SALT deduction, basis and cash-flow effects, and taxes paid to other states. It also tests whether every owner benefits; resident and nonresident owners can have different outcomes.

The workpaper should retain the state election, payment confirmations, current state instructions, owner allocation, K-1 support, projected itemized deductions, and the reconciliation between the entity return and each owner return. A dollar-savings claim is not reliable until those facts are modeled for the applicable year.

State-by-State Variations

Each state's PTET regime differs in important ways:

• Election timing: Some states require annual election (NY, CA); others apply automatically once enacted.

• Election deadline: The due date and availability of a late election vary by state and year.

• Tax base: Some states tax all entity income; others tax only the resident owner's share.

• Tax rate: Generally tracks the highest marginal personal income tax rate of the state.

• Credit mechanics: Some states provide a credit; others provide an income exclusion or deduction.

• Owner eligibility: Some states limit PTET benefits to resident owners; others extend to non-residents.

Confirm the State's Current Program

PTET availability and mechanics have expanded and changed over time. Before an election is recommended, we use the applicable state tax agency's current page and form instructions to confirm eligible entities and owners, the tax base, election deadline, estimates, credit or exclusion mechanics, and treatment of nonresidents.

Key Considerations

1. Cash flow. PTET requires the entity to make estimated tax payments to the state — typically quarterly. This creates a working capital requirement at the entity level even though the owner ultimately receives a credit.

2. Multi-state owners. Owners with operations in multiple PTET states face complex coordination. Each state's election must be evaluated separately, and credit utilization across state returns requires careful planning.

3. Non-resident owners. Some PTET regimes do not benefit non-resident owners equally. A New York LLC with a Florida-resident partner may benefit at the entity level but provide no individual benefit to the Florida partner.

4. Federal AMT. The federal AMT generally does not impact PTET benefits, since the entity-level deduction is a regular business deduction.

5. Return-to-payor mechanism. Some states allow the owner to "back out" of PTET if it doesn't provide individual benefit. Most don't — the election is binding for the year.

Coordination With S-Corp Reasonable Compensation

For S-corporation owners, a state's PTET base may treat distributive income differently from W-2 wages. Reasonable compensation remains subject to federal payroll-tax rules, while the owner's individual state taxes are tested under the filing-year SALT limit and phase-down.

Reasonable compensation must be determined independently under federal payroll-tax rules. PTET is not a reason to suppress an owner-employee's W-2 below a supportable amount; compensation, distributive income, and the state election should be modeled as separate compliance decisions.

Audit Risk and Documentation

The IRS issued Notice 2020-75 confirming that PTET payments are deductible at the entity level — providing critical safe harbor for taxpayers electing PTET. The Notice covered both cash- and accrual-basis pass-through entities.

However, certain implementations have drawn IRS scrutiny:

• Sham elections where PTET produces no real economic state tax obligation.

• Mismatched timing between the PTET payment and the credit claimed by owners.

• Improper allocation of PTET payments to non-business income.

Common Mistakes

• Missing the state-specific election or estimated-payment deadline.

• Failing to make required estimated PTET payments at the entity level.

• Electing PTET when the owner is in a non-conforming state or has no state tax liability to credit.

• Confusing PTET (entity-level state tax) with the unrelated federal qualified business income deduction (§199A).

• Not coordinating PTET with multi-state entities (each state evaluated separately).

• Treating PTET as a simple election without modeling the after-tax outcome.

Why the Election Still Needs Annual Review

Current law temporarily raises and indexes the individual SALT limit through 2029, with income-based phase-down rules. That can reduce or change the incremental value of PTET for some owners without eliminating the need to model it. State rules, owner residency, entity cash flow, federal deduction timing, and the individual's itemized-deduction position can all change from one year to the next.

Bottom Line

For pass-through business owners, PTET can remain an important tax planning decision, but the answer is owner- and state-specific. Evaluate the election annually using current federal and state guidance, document the election and payments, and reconcile the entity deduction to the owner-level credit or exclusion.